EP0360405A3 - Fühler des Kühlmittelniveaus mit zwei Drähten - Google Patents

Fühler des Kühlmittelniveaus mit zwei Drähten Download PDF

Info

Publication number
EP0360405A3
EP0360405A3 EP89308182A EP89308182A EP0360405A3 EP 0360405 A3 EP0360405 A3 EP 0360405A3 EP 89308182 A EP89308182 A EP 89308182A EP 89308182 A EP89308182 A EP 89308182A EP 0360405 A3 EP0360405 A3 EP 0360405A3
Authority
EP
European Patent Office
Prior art keywords
output
lamp
probe
circuit
oscillator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89308182A
Other languages
English (en)
French (fr)
Other versions
EP0360405A2 (de
Inventor
Daniel G. Lasley
Keith W. Kawate
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texas Instruments Inc
Original Assignee
Texas Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Texas Instruments Inc filed Critical Texas Instruments Inc
Publication of EP0360405A2 publication Critical patent/EP0360405A2/de
Publication of EP0360405A3 publication Critical patent/EP0360405A3/de
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G01F23/243—Schematic arrangements of probes combined with measuring circuits
    • G01F23/244—Schematic arrangements of probes combined with measuring circuits comprising oscillating circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
EP89308182A 1988-08-18 1989-08-11 Fühler des Kühlmittelniveaus mit zwei Drähten Withdrawn EP0360405A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23369888A 1988-08-18 1988-08-18
US233698 1988-08-18

Publications (2)

Publication Number Publication Date
EP0360405A2 EP0360405A2 (de) 1990-03-28
EP0360405A3 true EP0360405A3 (de) 1990-04-11

Family

ID=22878343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89308182A Withdrawn EP0360405A3 (de) 1988-08-18 1989-08-11 Fühler des Kühlmittelniveaus mit zwei Drähten

Country Status (2)

Country Link
EP (1) EP0360405A3 (de)
JP (1) JPH0282119A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0405835A3 (en) * 1989-06-28 1991-05-02 Texas Instruments Incorporated Two wire coolant level sensor
DE3940853A1 (de) * 1989-12-11 1991-06-13 Balzers Hochvakuum Anordnung zur niveauregelung verfluessigter gase
FR2847340B1 (fr) 2002-11-15 2005-02-25 Jacques Morineau Procede de mesure de la hauteur d'un liquide au moyen d'une sonde a ligne haute frequence et sonde utilisee

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2081452A (en) * 1980-08-01 1982-02-17 Endress Hauser Gmbh Co Container fluid level determination
GB2097126A (en) * 1981-04-16 1982-10-27 Sozaburo Maeshiba Indicating the quantities of liquids in tanks
EP0101580A1 (de) * 1982-08-25 1984-02-29 Berwind Corporation Kapazitiver Materialstandindikator
US4485673A (en) * 1981-05-13 1984-12-04 Drexelbrook Engineering Company Two-wire level measuring instrument

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2081452A (en) * 1980-08-01 1982-02-17 Endress Hauser Gmbh Co Container fluid level determination
GB2097126A (en) * 1981-04-16 1982-10-27 Sozaburo Maeshiba Indicating the quantities of liquids in tanks
US4485673A (en) * 1981-05-13 1984-12-04 Drexelbrook Engineering Company Two-wire level measuring instrument
EP0101580A1 (de) * 1982-08-25 1984-02-29 Berwind Corporation Kapazitiver Materialstandindikator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELEKTOR *

Also Published As

Publication number Publication date
JPH0282119A (ja) 1990-03-22
EP0360405A2 (de) 1990-03-28

Similar Documents

Publication Publication Date Title
US4250464A (en) Multi-mode relaxation oscillator
KR970004170A (ko) 저가의 레이저 레인지 파인더 시스템 구조
US4825211A (en) Warning device for vehicles against an approaching objects
KR19980024034A (ko) 자동차용 배터리 방전 방지장치
EP0008508A1 (de) Flüssigkeitsstandanzeiger
EP0360405A3 (de) Fühler des Kühlmittelniveaus mit zwei Drähten
DE59307119D1 (de) Halbleiterrelais
US3875527A (en) Environmental parameter controlled oscillator system
US2995687A (en) Circuit for sounding an alarm when the incoming signal exceeds a given amplitude
GB1598821A (en) Ionization detectors
US4380754A (en) Electric indicator utilizing an oscillation source of a crystal clock for automobiles
JPH0151773B2 (de)
KR890000469Y1 (ko) 전자기기의 건전지 교체회로
EP0405835A2 (de) Fühler des Kühlmittelniveaus mit zwei Drähten
JPS5657943A (en) Smoke sensing system
KR890005023Y1 (ko) 가스누설 경보 수신기의 단말기 제어장치
SU478432A1 (ru) Селектор импульсов
SU789827A1 (ru) Устройство дл контрол напр жени
JPH08274611A (ja) フィールド機器用タッチキー
KR0128100Y1 (ko) 시계의 밧데리 전원 경보장치
SU1188900A2 (ru) Устройство согласовани
JP2681478B2 (ja) 半導体式熱感知器
JPS57212829A (en) Transmitter
SU1104445A1 (ru) Устройство дл обнаружени неисправностей в цеп х сигнализации
JPS5928272B2 (ja) 煙感知器用電池の寿命検出方式

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT NL

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19901009

17Q First examination report despatched

Effective date: 19921210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19950211